Cafemom always has problems like this, but when you contact them about they always claim it's your computer and not their system. If it's not their system then why it is the only website that's slow or locks up?
I'm not having the problem over here, so I'm going to assume it's your area or your computer. I would check the number of cookies you have on your computer, and your history related to cafemom. clear your caches...see if it helps.